A man, wearing socks featuring the design of the British Union Flag, commonly known as a Union Jack, stands in London. U.K. Prime Minister David Cameron said he’ll hold a long-pledged referendum on the U.K.’s membership of the European Union on June 23

Revellers dace as they take part in the Patum in the Catalan village of Berga, Spain. The Patum of Berga is a popular festival whose origin can be traced to medieval festivities that is celebrated each year in the Catalan city of Berga during Corpus Christi

Leader of the United Kingdom Independence Party (UKIP), Nigel Farage sits outside a cafe waiting for his coffee during campaigning for votes to leave the European Union today in Chapeltown near Sheffield, England.

A child rides his toy bike as Belgian prison officers demonstrate behind the Saint-Gilles prison where guards have been on strike for three weeks in a protest over pay cuts and working conditions in Brussels, Belgium on Tuesday